Author
Topic: Canon 5D Mark III Light Leak? (Read 27248 times)

sky87

I've just tested this with my mk3 and I have the same problem. Also did a quick test with the lens attached and pointed it to the lamp, half pressed the shutter to focus and take a reading then shone a flashlight against the lcd and that affected the exposure. Will do some proper tests in the daylight and see how it differs.Its causing slight concerns with me, lets see if Canon do a recall. I'd hate to be without my camera!

With the VF covered and Lenscap on => Same issue as in the movieWith the VF covered and no Lenscap on => No issueWith the VF covered and a very very very strong led beam beamed directly on the LCd => No issue.

So in short....no issue (for me) without the lenscap.Strange enough I never leave the lenscap on.

Yup, same here.. I'll try in the sun tomorrow.

I'm California, right now is 2:17PM, temp at 82F, very sunny.

* Covered VF, with 50mm lens attached - NO ISSUE

Quote

I'm California, right now is 2:17PM, temp at 82F, very sunny.

Lucky you......Sometimes I have to wait days/weeks for a day with sunshine ....

Logged

prestonpalmer

I've just tested this with my mk3 and I have the same problem. Also did a quick test with the lens attached and pointed it to the lamp, half pressed the shutter to focus and take a reading then shone a flashlight against the lcd and that affected the exposure. Will do some proper tests in the daylight and see how it differs.Its causing slight concerns with me, lets see if Canon do a recall. I'd hate to be without my camera!

This "issue" is exactly the same on my 5D2. Canon will not be doing a recall. I have taken tens of thousands of amazing wedding pictures with my 5D2's with the same aparrent problem. As far as I am concerned, this is a non issue with my 5D3.

With the VF covered and Lenscap on => Same issue as in the movieWith the VF covered and no Lenscap on => No issueWith the VF covered and a very very very strong led beam beamed directly on the LCd => No issue.

So in short....no issue (for me) without the lenscap.Strange enough I never leave the lenscap on.

Yup, same here.. I'll try in the sun tomorrow.

I'm California, right now is 2:17PM, temp at 82F, very sunny.

* Covered VF, with 50mm lens attached - NO ISSUE

Quote

I'm California, right now is 2:17PM, temp at 82F, very sunny.

Lucky you......Sometimes I have to wait days/weeks for a day with sunshine ....

If this is a "REAL" problem - I can bring my down to Canon Service Center, Irvine - CA. Only 15mins driving for me.

I hope the problem turns out to be real and leads Canon to just abolish the totally unnecessary analogue-days-artefact top-LCD on all future digital cameras. That would be the best, easiest and CHEAPEST solution.

Smith

It seems that this might be due to manufacturing variations instead of a "design flaw." Some people can reproduce this effect on both the 5DII and 5DIII while others cannot . There also seems to be a lot of variation to how much the exposure is affected. This is important for various reasons:

1) Manufacturing variations are much harder to fix than large obvious flaws which uniformly affect everyone. There might be some improvement as the manufacturing process matures but there's no guarantee. There will be no recall for something like this as Canon will just fix it under warranty.

2) There's no need to debate whether or not this is a "non-issue." For most people it isn't a problem. However, some people may have it worse than others. Based on how people are using the camera it may or may not be a problem for them. The fact that it doesn't affect you doesn't mean it's not a problem for someone else.

3) If later units have less of a problem than earlier ones it will depreciate the value of the camera for people who buy now. Nobody is going to want to buy a 5DIII from the "faulty early batches."

This issue reminds me of the light leakage problem on the Nikon 24-70 f/2.8. Although this really wasn't an issue for most people Nikon owned up to the problem and addressed it. Let's hope Canon takes the same action. IMO although it may not be an issue for many people it doesn't look good for your brand. This is a $3500 DSLR. At this price people expect a trustworthy tool that they can rely on. Intel had the division bug in the Pentium that would not affect most people. However, it just made people feel uncomfortable with trusting their results and that alone was a PR nightmare. Canon management needs to get in front of this issue and address it or the Internet community will create its own ugly conclusions.

Logged

canikon

I have similar situations of under exposure when I walked around a hotel to shoot in an event, the light sources are varied, so it caused high rate of under exposures. my backup camera is nikon d7000, it seems working as normal as usual. my 5d3 has leakage condition as the forum reported. I did the similar tests. So I suspected the link between the LCD leakage and under exposures.

It seems that this might be due to manufacturing variations instead of a "design flaw." Some people can reproduce this effect on both the 5DII and 5DIII while others cannot . There also seems to be a lot of variation to how much the exposure is affected. This is important for various reasons:

1) Manufacturing variations are much harder to fix than large obvious flaws which uniformly affect everyone. There might be some improvement as the manufacturing process matures but there's no guarantee. There will be no recall for something like this as Canon will just fix it under warranty.

2) There's no need to debate whether or not this is a "non-issue." For most people it isn't a problem. However, some people may have it worse than others. Based on how people are using the camera it may or may not be a problem for them. The fact that it doesn't affect you doesn't mean it's not a problem for someone else.

3) If later units have less of a problem than earlier ones it will depreciate the value of the camera for people who buy now. Nobody is going to want to buy a 5DIII from the "faulty early batches."

This issue reminds me of the light leakage problem on the Nikon 24-70 f/2.8. Although this really wasn't an issue for most people Nikon owned up to the problem and addressed it. Let's hope Canon takes the same action. IMO although it may not be an issue for many people it doesn't look good for your brand. This is a $3500 DSLR. At this price people expect a trustworthy tool that they can rely on. Intel had the division bug in the Pentium that would not affect most people. However, it just made people feel uncomfortable with trusting their results and that alone was a PR nightmare. Canon management needs to get in front of this issue and address it or the Internet community will create its own ugly conclusions.

case 2: A DIFFERENT 7d body with 50mm f/1.2L, LENS CAP ON, VF BLOCKED, DARK ROOM WITH PC MONITOR ON.in Av mode or P mode, the shutter speed changes (3"2 to 2"5 and back) when I half press the shutter button and change the orientation of the camera a little.

The LCD backlight doesn't affect the shutter speed/exposure when on. but why is the exposure fluctuating that much?